Created by Suffolk-based garden designers Deakinlock, the space aims to provide a rest and recreation area for off-ship seafarers at the UK's largest container port.
The garden, installed by DNA Landscapes, incorporates a timber perogola with Perspex roof to provide light while protecting from the elements, seating areas, raised beds and sensitively designed fencing to screen a neighbouring railway line.
Princess Anne was shown around by Deakinlock founding partner Jason Lock and Seafarers' Centre chair captain Nigel Pryke.
Lock said: "We had a limited budget and a challenging site, which was largely tarmac and close to a rail line. It was a privilege to show Her Royal Highness how we transformed the area and she seemed genuinely impressed."